Read bytes bug ?

[Userzxcvbvnm]

Describe the bug

Read bytes bug.

Steps to reproduce

(1)The test case is :

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/uio.h>

int get_fd(const char *filename, int flags) {
    int fd = open(filename, flags);
    
    if (fd == -1) {
        printf("Get file descriptor of file %s failed!\n", filename);
        return -1;
    } else {
        printf("Get file descriptor of file %s succeed!\n", filename);
        return fd;
    }
}

void closebyfd(int fd) {
    if (close(fd) == -1) {
        printf("Close the file %d by descriptor failed!\n", fd);
    }
}

void fd_read_00022_Ep05V(int fd) {
    printf("Enter function fd_read_00022_Ep05V\n");

    char buf1[1];
    char buf2[1];
    struct iovec iov[2];
    ssize_t num_read;

    iov[0].iov_base = buf1;
    iov[0].iov_len = 1;
    iov[1].iov_base = buf2;
    iov[1].iov_len = 1;

    num_read = readv(fd, iov, 2);

    if (num_read == -1) {
        printf("Error reading from file descriptor\n");
    } else {
        printf("Read %ld bytes using readv\n", num_read);
    }
}

int main() {
    int fd = get_fd("softfile_2", O_RDWR | O_TRUNC | O_CREAT);
    if (fd == -1) {
        return 1;
    }

    fd_read_00022_Ep05V(fd);

    closebyfd(fd);
    
    return 0;
}

(2)compile to wasm:./wasi-sdk-21.0/bin/clang --target=wasm32-unkown-wasi --sysroot=./wasi-sdk-21.0/share/wasi-sysroot test.c -o test.wasm

(3)Running wasm:
(Before run the Wasm file, softfile_2 exists and softfile_2 is a softlink file points to subdir_1/subdir_4/subfile_2, subdir_1/subdir_4/subfile_2 exists and the file is 53 bytes.)
wasmer run --dir=. test.wasm

Expected behavior

print:

Get file descriptor of file softfile_2 succeed!
Enter function fd_read_00022_Ep05V
Read 2 bytes using readv

Actual behavior

wasmer print:

Get file descriptor of file softfile_2 succeed!
Enter function fd_read_00022_Ep05V
Read 0 bytes using readv

First, the file size is 53, wasmer open the file with O_TRUNC, the file is expected to be truced to 0 bytes, however, by checking with command line, we found the file is not trunced and remains 53 bytes.
However, the buffer size is 2 bytes, but 0 bytes are read.

Additional context

Ubuntu 20.04
x86_64
wasmer-4.3.1